Duplicating and swaging device.



I PATENTED NOV. 20, 1906. S. S..MILLETT,

DUPLIUATING AND SWAGING DEV-ICE.

APPLICATION FILED AUG. 13, 1901.

iiii! llmmnmnu WITNESSES UNITED STATES PATENT OFFICE.

DUPLIOATING AND SWAGING DEVICE.

Specification of Letters Patent.

Patented Nov. 20, 1906.

Application filed August 13. 1901. Serial No. 71,917.

To all whom it natty concern:

Be it-known that I, SHIRLEY S. MILLETT, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Duplicating and Swaging Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will en= able others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in duplicating and swaging devices which I employ particularly for crown and bridge work, reproducing artificial tooth-crowns the exact counterparts of natural teeth. These devices may also be used in duplicating and reproducing monograms and articles of jewelry from any desired specimens.

I have discovered that sealingwax, in conjunction with the devices hereinafter described, and shown upon the drawings, for duplicating tooth-crowns, can be more easily, quickly, and economically used than any other material heretofore known in connection with the devices and mechanism herein shown.

Some of the objects of my invention are to reproduce and duplicate upon sheets of gold the exact counterparts of the crown of natural teeth. The devices which I employ in connection with sealing-wax to carry out my invention are new and have not as yet been brought to the attention of the dental profession.

I attain some of the objects hereinbefore referred to by the devices shown in conjunction with sealing-wax, as shown upon the drawings, in which- Figure 1 represents a perspective view of the metal base or bed-die. Fig. 2 represents the die for the formation of the tooth-crown. Fig. 3 represents the counter-die. Fig. 4 is a perspective view of the different parts of my improved devices assembled preparatory to being dropped into their respective places for work. Fig. 5 is a vertical section of the devices complete with parts thereof in place ready to form the metal plate in the form.

and configuration required from an impression taken from a natural tooth, and Fig. 6 represents a case or frame containing a great variety of forms of natural teeth.

In Fig. 1 of the drawings, the numeral 1 indicates the bed-die or metal base and which has about its center in one side a small countersunk recess or hole 2. (Shown upon Figs. 1 and 5 of the drawings.) Upon this base or bed-die 1 I melt or soften by a spirit-lamp or other means a small lump of sealing-wax until the face of the die is covered or partially covered, as illustrated in Figs. 2 and 3, and a portion of the sealing-wax is pressed or flows into the recess or hole 2 and'upon the face of the bed-die, as shown in Figs. 2, 3, and 4 of the drawings.

When the sealing-wax is somewhat hardened and after removing the spirit-lamp or other means employed, that portion of the sealing-wax that has entered the hole or recess 2 in the face of the bed-die 1, being a part of the homogeneous mass of the sealingwax remaining upon the face of the bed-die, holds the mass in place and when pressure is applied thereto prevents the slipping or gisplacement of the mass from the face of the While the sealing-wax is still in a plastic state and held in the countersunk recess or hole 2 I apply the same to the crown of the natural tooth or to one of the many selections of crowns of teeth shown in Fig. 6 of the drawings, thereby producing the exact counterpart of the tooth-crown desired. This reproduction of the natural tooth-crown upon the wax of the bed-die or the duplicate of one of the select crowns shown in the case in Fig. 6 of the drawings is a reverse of the tooth desired to be eventually reproduced.

In a similar manner to that hereinbefore described I prepare a lump of sealing-wax for another base or bed-die (shown at 4 in Fig. 3) like that shown in Figs. 1 and 2, and while the wax is soft,it is pressed upon the sealingwax at 3, (shown in Fig. 2,) and when sufliciently cooled the die and wax (shownat 4 in Fig. 3) is withdrawn and the form is the reverse of that illustrated at 3 in Fig. 2 of the drawings, each of the dies shown in Figs.2 and 3 containing sealing-wax with impressions obtained from a natural tooth.

I will now proceed to describe how the gold plate 6 or other metallic plates is produced from the reverse or counter die upon the wax. (Shown in Fig. 4 of the drawings.) A hollow cylinder 5 is provided with an internal diameter about equal to that of the counterbase or bed-die. (Shown in Figs. 1, 2, and 3 of the drawings.) The counterbase or bed-die shown at 1 Fig. 3, and the sealing-wax 4, Fig. 3, containing the impression of the tooth from which the gold crown is to be made, is

dropped into the bottom of the cylinder, and upon said counter or base-die a thin disk or sheet of gold 6 or other metal is placed, and upon the disk or sheet of gold within the cylinder I place a rubber bung or cushion 7. I then place the plunger 8 Within the cylinder 5, upon the rubber bung or water-bag, and apply pressure to the upper projecting end thereof in order that the gold plate may be thoroughly impressed into all the crevices and interstices of the wax upon the bed-die, thereby giving to the gold plate 6 or toothcrown the natural impression retained by the sealing-wax of the natural tooth. The lower end of the plunger 8 is concave, as shown upon Fig. 5 of the drawings, in order to securely hold the elastic bung or cushion 7 in a true vertical line upon the disk or sheet of gold 6 or other metal placed upon the sealingwaX, asshown upon Fig. 5 of the drawings. The lower concave end of the cylinder 8, as shown in Fig. 5, holds the convex end ofthe cushion? therein and causes the lower face of the said cushion to ress the disk of gold plate 6 or other metal irmly into the sealingwaX placed upon the bed-plate 1.

The employment of sealing-wax or other suitable resinous substances I have found by experience has no injurious effect upon the go d plate 6 of which the tooth-crown is formed, as when a base metal is used upon which the crown is formed.

The operation of my devices in conjunction with sealing-Wax will be obvious and appaI- entfromthe foregoing description and upon inspection of the drawings.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In devices for receiving impressions of teeth and other articles, a base adapted to receive a layer of resinous material thereon provided with a central recess in the face thereof to receive a portion of the resinous-material, a double open-ended cylinder adapted to receive the said base and the said material placed thereon, a plunger provided with a concave end adapted to reciprocate within the cylinder.

2. Means for taking impressions of teeth and other articles, a base having a central recess in the face thereof adapted to receive a portion of the resinous material placed thereon, a two-ended open cylinder having the diameters of the same dimensions adapted to :receive the said base and the resinous material placed thereon, a plunger having aconcavity in the lower end thereof adapted to reciprocate within the cylinder to pressthe resinous material upon the face of the base.

3. The base having a central countersunk recess in the face thereof to receive a portion of resinous material pressed uponthe face of said base, a double-open-endedcylinderof uniform diameter throughout the entire length thereof, a plunger having'a concaved end adapted to reciprocate within thecylinder to press the said resinous material into sheets of metal.

4. A metal base, for supporting a bed-die provided with a central recess in the face :thereof to receive and hold portionsof wax ior other resinous material pressed upon said base, a cylinder of uniform diameter throughiout its entire length having an opening in each end thereof, a plunger having a'con- @cavity in oneend thereof adapted to recipro- 'cate Within the cylinder, an elastic cushion COHVQXQQl at one end and having a horizontal face at the opposite end, the said conveXed end of said cushion adapted to be received into the concavity in-the end'of the plunger.

In testimony whereof I have hereunto a'llixed my signature in presence of two witnesses.

SHIRLEY S. MILLETT.

Witnesses:

WILLIAM L. PIGG, CLAUD BRASHER. 

